Benjamin Moore Corotech Clear Epoxy Pre-Primer, Gallon, Part A is a high-performance solids epoxy pre-primer designed for use on both steel and masonry surfaces. This two-component epoxy is i for rusted steel where extensive surface preparation is challenging, thanks to its penetrating properties and extended dry time of 16 hours at 77 °F. It effectively seals crevices and imions, promoting superior adhesion for subsequent coats. On prepared masonry, it penetrates and seals to provide an excellent foundation for Corotech epoxy floor coatings. Its unique formula forms a sealed epoxy barrier that inhibits future corrosion, making it a reliable choice for both interior and exterior applications. With low viscosity, it easily fills voids and crevices without shrinking or forming craters. The product is chemical and fume resistant, and its extended cure time allows for maximum penetration. It can also seal previously coated concrete, masonry, and galvanized metal and qualifies for LEED certification. Available in a clear color with a semi-gloss sheen, cleanup is simple with solvent. This pre-primer is rated for low VOC emissions, making it an environmentally responsible option. Model Number: Part A